CN113381569A

CN113381569A - Motor rotor penetrating device

Info

Publication number: CN113381569A
Application number: CN202110666910.3A
Authority: CN
Inventors: 黄鹏
Original assignee: Huaneng Taicang Power Generation Co Ltd
Current assignee: Huaneng Taicang Power Generation Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-09-10

Abstract

The invention relates to a motor rotor penetrating device which comprises a guide rail, a dummy shaft sleeve, a stator moving device and a rotor supporting device, wherein the rotor supporting device is used for supporting a motor rotor; the stator moving device comprises an object placing plate and a moving assembly, the moving assembly moves back and forth along the guide rail, a horizontal adjusting mechanism is arranged between the moving assembly and the object placing plate, the motor stator is placed on the object placing plate, and a limiting and positioning mechanism is arranged on the object placing plate; the rotor supporting device comprises a plurality of supporting frames, and the arrangement positions and the heights of the supporting frames can be adjusted. Compared with the prior art, the motor rotor is supported by the support frame and the height of the motor rotor is adjusted, so that the center lines of the motor stator and the motor rotor can be aligned, the motor stator is driven to move along the guide rail by the stator moving device, the motor rotor can easily penetrate into the motor stator, the collision and abrasion between the motor stator and the motor rotor are avoided, and the structural damage of the motor stator and the motor rotor is effectively prevented.

Description

Motor rotor penetrating device

Technical Field

The invention relates to the technical field of motor maintenance, in particular to a motor rotor penetrating device.

Background

In the conventional large motor overhaul process, a large motor rotor is generally hoisted and moved by means of a factory crane, for example, a steam turbine generator shaft core penetrating device disclosed in chinese patent CN207265842U and a core pulling method for large motor overhaul disclosed in chinese patent CN 107204690B. The Huanengtai storehouse power plant generally uses factory building crane and dummy shaft sleeve to cooperate to hoist and mount to pass back when carrying out motor rotor to pass back in the motor maintenance process.

The operation process is shown in fig. 1. The motor stator is horizontally placed on the ground of a factory building, a dummy shaft sleeve is sleeved on a shaft of a motor rotor, and the dummy shaft sleeve penetrates into the motor stator; and a workshop crane and a steel wire rope are used for hoisting the motor rotor and the dummy shaft sleeve, and the centers of the motor stator and the motor rotor are aligned and static. In a working site, a plurality of workers can hold the motor rotor stably lifted by hands, the operator inching the workshop crane to drive the motor rotor to do horizontal motion along the axial direction, and finally the motor rotor penetrates into the stator bore. In the process of penetrating the motor rotor, the chain blocks on the two sides of the suspended steel wire rope can respectively adjust the heights of the two ends of the motor rotor so as to ensure that the motor rotor is in a horizontal state. However, the above conventional methods have various disadvantages and shortcomings.

The clearance between motor stator, the motor rotor is very little, and the collision between motor stator, the motor rotor grinds and can cause the damage to motor stator and motor rotor structure. Firstly, because large-scale motor rotor weight is heavier, and inertia is great, when the factory building driving is moved to the manual inching and drive motor rotor axial motion, can make motor rotor and dummy shaft sleeve have the axial forward and backward swing phenomenon inevitably, motor rotor has the slight swing just very easily to cause the collision between motor stator, motor rotor in the motor stator thorax and grinds. Secondly, because the construction site ground is uneven, motor stator is placed probably not horizontally, along with motor rotor's entering, the staff need frequently adjust the height of motor rotor to the chain block on the wire rope of both sides by hand, wastes time and energy, just can make motor stator, motor rotor bump the mill to take place for a short time carelessly. In addition, if the centers of the motor stator and the motor rotor in the horizontal direction are not aligned, a plurality of people are required to continuously push and pull the motor rotor, so that the motor rotor rotates by a certain angle, and the risk brought to the personal safety of workers due to the collision and abrasion of the motor stator and the motor rotor in the horizontal direction is prevented. And the number of workers needed for penetrating the motor rotor back in the existing mode is large, the matching requirement among the workers is also high, and the conventional 6 kV motor can be completed by at least more than 5 skilled workers.

And finally, after the motor rotor penetrates into a motor stator chamber, the accessory installation is required. An operator places the motor rotor on the stator core through the operation workshop crane, and the weight of the motor rotor is borne by the stator core. In subsequent accessory installation work, if the motor rotor needs to be lifted up on one side, the support of the motor rotor in a motor stator bore is completely concentrated on the small area of the end part of the stator core, the stator core and the slot wedge are damaged by compression, and the stator core or the motor rotor is damaged by local compression deformation or the slot wedge of the stator core is damaged and falls off in severe cases.

In summary, the existing motor rotor back-through process has some disadvantages and shortcomings, and a corresponding technical scheme needs to be designed for solving the problems.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a motor rotor penetrating device, the motor rotor is supported by a support frame, the height of the motor rotor is adjusted, the central lines of the motor stator and the motor rotor can be aligned, the motor stator is driven by a stator moving device to move along a guide rail, the motor rotor can be easily penetrated into the motor stator, the collision and abrasion between the motor stator and the motor rotor are avoided, and the structural damage of the motor stator and the motor rotor is effectively prevented.

The purpose of the invention can be realized by the following technical scheme:

a motor rotor penetrating device comprises a guide rail, a dummy shaft sleeve, a stator moving device and a rotor supporting device, wherein the stator moving device moves back and forth along the guide rail, and the rotor supporting device is used for supporting a motor rotor;

the stator moving device comprises an object placing plate and a moving assembly, the moving assembly moves back and forth along the guide rail, a horizontal adjusting mechanism is arranged between the moving assembly and the object placing plate and used for adjusting the levelness of the object placing plate, the motor stator is placed on the object placing plate, and a limiting and positioning mechanism is arranged on the object placing plate and used for limiting and positioning the motor stator;

the rotor supporting device comprises a plurality of supporting frames, and the arrangement positions and the heights of the supporting frames can be adjusted.

Preferably, the guide rail comprises two horizontal rails parallel to each other.

Preferably, the support frame is arranged between two horizontal steel rails.

Preferably, the dummy shaft sleeve is a steel pipe, and the length of the dummy shaft sleeve is greater than that of the stator bore.

Preferably, the stator moving device is a horizontal pallet truck, the object placing plate is a bedplate, the moving assembly is wheels, a horizontal adjusting mechanism is arranged between the wheels and the bedplate and used for adjusting the levelness of the bedplate, and the bedplate is provided with a limiting and positioning mechanism and used for fixing the motor stator on the bedplate.

Preferably, the number of wheels is 4.

Preferably, the horizontal adjusting mechanism is a horizontal fine adjusting knob arranged between each wheel and the bedplate.

Preferably, the limiting and positioning mechanism comprises 4 positioning knobs which are respectively arranged at four corners of the object placing plate.

Preferably, the support frame is a support frame controlled to lift by hydraulic pressure.

Preferably, the support frame is provided with scale marks.

Preferably, the top of the support frame is in a concave arc shape, and is matched with the shape of a rotating shaft of the motor rotor and the shape of a dummy shaft sleeve sleeved on the rotating shaft of the electronic rotor.

Preferably, a buffer isolation layer is arranged in the concave arc shape at the top of the support frame.

Compared with the prior art, the invention has the following beneficial effects:

(1) support electric motor rotor and adjust electric motor rotor's height through the support frame, can be so that electric motor stator and electric motor rotor's central line aligns, drive electric motor stator through stator mobile device and remove along the guide rail, can easily penetrate electric motor stator with electric motor rotor, avoided bumping between electric motor stator and the electric motor rotor and ground, prevent electric motor stator and electric motor rotor structural damage effectively.

(2) The guide rail is a horizontal steel rail, the level of a construction site is guaranteed, the height and the levelness of the motor stator are guaranteed by combining the stator moving device, the height and the levelness of the motor rotor are guaranteed through the supporting frame with adjustable height, the height of the motor rotor does not need to be frequently adjusted manually when the rotor is threaded back, and the working efficiency is improved.

(3) The support frame is hydraulic control, has the scale mark, can instruct accurate, the fast speed adjusting motor stator, motor rotor central line according to the scale at the staff, and to a great extent has promoted work efficiency.

(4) The motor rotor is supported by the supporting frame, the motor stator and the motor rotor are not in contact in the process of rotor back-through and accessory installation, collision and abrasion between the motor stator and the motor rotor are avoided, and parts such as a stator core, a stator slot wedge, a rotor core and the like cannot be damaged.

(5) The application provides a rotor device is worn to motor easy operation has reduced the required staff quantity of rotor back-through in-process, and is not high to the cooperation requirement between the staff, has reduced the human cost, has promoted work efficiency.

Drawings

FIG. 1 is a schematic diagram of the operation of a prior art rotor pull-back process;

FIG. 2 is a side and top view of the present invention;

FIG. 3 is a side view of the device with the motor stator and motor rotor in place during rotor pull-back;

FIG. 4 is a side view of the device during penetration of the motor rotor into the motor stator during rotor pull-back;

FIG. 5 is a side view of the device with the dummy shaft sleeve removed during rotor pull-back;

FIG. 6 is a side view of the device with the motor end cap nested during the rotor threading back;

FIG. 7 is a side view of the apparatus during rotor pull-back with motor end cap installed;

FIG. 8 is a side view of the device at the completion of the rotor pull-back during the rotor pull-back;

reference numerals: 1. motor stator, 2, electric motor rotor, 3, guide rail, 4, false axle sleeve, 5, stator mobile device, 6, horizontal adjustment mechanism, 7, spacing positioning mechanism, 8, support frame, 9, motor end cover, 10, factory building driving, 11, wire rope, 12, chain block.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. Parts are exaggerated in the drawing where appropriate for clarity of illustration.

Example 1:

in the existing motor maintenance process, as shown in fig. 1, a plant crane 10 and a steel wire rope 11 are used for hoisting a motor rotor 2, the plant crane 1 is clicked to axially move the motor rotor 2, so that the motor rotor 2 penetrates into a motor stator 1, and a chain block 12 on the steel wire rope 11 is used for adjusting the level of the motor rotor 2 in the moving process of the motor rotor 2. However, existing hoisting rethreading processes have a number of limitations and disadvantages.

The application provides a motor rotor penetrating device, which is shown in a side view and a top view in fig. 2 and comprises a guide rail 3, a dummy shaft sleeve 4, a stator moving device 5 and a rotor supporting device, wherein the stator moving device 5 moves back and forth along the guide rail 3, and the rotor supporting device is used for supporting a motor rotor 2; the stator moving device 5 comprises an object placing plate and a moving assembly, the moving assembly moves back and forth along the guide rail 5, a horizontal adjusting mechanism 6 is arranged between the moving assembly and the object placing plate and used for adjusting the levelness of the object placing plate, the motor stator 1 is placed on the object placing plate, and a limiting and positioning mechanism 7 is arranged on the object placing plate and used for limiting and positioning the motor stator 1; the rotor supporting device comprises a plurality of supporting frames 8, and the arrangement position and the height of the supporting frames 8 can be adjusted.

Specifically, the guide rail 3 comprises two parallel horizontal steel rails, the dummy shaft sleeve 4 is a steel pipe, the length of the dummy shaft sleeve 4 is larger than that of the stator chamber, the stator moving device 5 is a horizontal pallet truck, and the support frame 8 is a support frame for lifting under hydraulic control.

This application makes the job site keep the level through horizontal rail, has improved the precision that electric motor rotor 2 penetrated, aligns the back with electric motor stator 1 and electric motor rotor 2's central line level, no longer need carry out frequent manual adjustment to electric motor rotor 2's height, has improved work efficiency.

When the device is used for rotor back-threading, the motor stator 1 is placed on the stator moving device 5, the dummy shaft sleeve 4 is sleeved on the rotating shaft of the motor rotor 2, and the motor rotor 2 and the dummy shaft sleeve 4 are supported by the supporting frame 8. The level and the position of motor stator 1 on stator mobile device 5 are adjusted, the height of support frame 8 is adjusted for motor stator 1 and electric motor rotor 2 align, rethread stator mobile device 5 removes motor stator 1, makes electric motor rotor 2 penetrate motor stator 1.

Stator mobile device 5 is horizontal platform board car, puts the thing board and is the platen, and the removal subassembly is the wheel, also can easily move along guide rail 3 after placing motor stator 1. As shown in fig. 2, a horizontal adjusting mechanism 6 is arranged between the wheels and the bedplate for adjusting levelness of the bedplate, and a limiting and positioning mechanism 7 is arranged on the bedplate for fixing the motor stator 1 on the bedplate.

The limiting and positioning mechanism 7 comprises 4 positioning knobs which are respectively arranged at four corners of the object placing plate; the quantity of wheel is 4 for motor stator 1's removal is more steady, and level adjustment mechanism 6 can be nimble, accurate carry out the levelness and adjust for locating the level fine setting knob between each wheel and the platen. The horizontal adjusting mechanism 6 and the position limiting and positioning mechanism 7 are generally used in the industry or are known to those skilled in the art, and the structure and principle thereof are known to those skilled in the art through technical manuals or through conventional experimental methods, and are not described herein.

The support frame 8 is the support frame that hydraulic control goes up and down, and the quantity is 4, can increase and decrease in other embodiments in a flexible way, and support frame 8 changes its position of arranging according to the degree of penetration in the rotor rethreading in-process. The arrangement mode of the support frame 8 can be arranged between the two horizontal steel rails or can be spanned on the two horizontal steel rails. The lifting support frame 8 controlled by hydraulic pressure is provided with scale marks.

At adjustment motor stator 1, when 2 central lines of electric motor rotor align, motor stator 1's level has been confirmed with horizontal platform truck to horizontal rail, height and position, only need make the position of arranging of adjusting support frame 8 and highly just can make motor stator 1 and the alignment of 2 central lines of electric motor rotor, support frame 8 is hydraulic control, hydraulic pressure is equipped with the scale on the fore-set and instructs, the occasion that the big batch electric motor rotor 2 of the same model penetrated, the staff can instruct the accuracy according to the scale, quick adjustment motor stator 1, 2 central lines of electric motor rotor, to a great extent has promoted work efficiency.

The top of the support frame 8 is concave arc shape, which is matched with the shape of the rotating shaft of the motor rotor 2 and the shape of the dummy shaft sleeve 4 sleeved on the rotating shaft of the electronic rotor 2, so that the cylindrical rotating shaft and the dummy shaft sleeve 4 can be conveniently placed, and the lateral displacement can not occur after the placement. The concave arc at the top of the support frame 8 is internally provided with a buffer isolation layer which can be made of flexible materials such as rubber and the like so as to avoid damaging the rotating shaft.

The operation method for penetrating back the motor rotor 2 by using the device is as follows:

(1) hoisting and placing the motor stator 1 on a horizontal pallet truck, arranging two support frames 8, and hoisting and placing the motor rotor 2 on the two support frames 8; the center of the dummy shaft sleeve 4 is lifted, the dummy shaft sleeve 4 penetrates through a stator chamber, a support frame 8 is arranged, one end of the dummy shaft sleeve 4 is sleeved on a rotating shaft of the motor rotor 2, and the other end of the dummy shaft sleeve is placed on the support frame 8. As shown in fig. 3.

(2) And (3) moving away the supporting frames 8 between the motor stator 1 and the motor rotor 2, adjusting the left and right positions of the motor stator 1 through four positioning knobs on the horizontal table plate, and adjusting the horizontal positions of the motor rotor 2 by adjusting the heights of the remaining two supporting frames 8 to enable the central lines of the motor stator 1 and the motor rotor 2 to be on the same horizontal line.

(3) Slowly pushing the horizontal pallet truck to move the motor stator 1 along the guide rail 3, and the motor rotor 2 with the aligned and horizontal center passes back into the stator bore. As shown in fig. 4.

(4) Arranging a support frame 8 to jack up the rotating shaft of the motor rotor 2 close to one end of the dummy shaft sleeve 4, removing the dummy shaft sleeve 4, enabling the motor rotor 2 to penetrate into a stator chamber at the moment, and supporting the rotating shafts at two ends of the motor rotor 2 by the support frame 8. As shown in fig. 5.

(5) And (3) carrying out accessory installation, taking the motor end cover 9 as an example, sleeving the motor end cover 9 on the outer sides of the two support frames 8 respectively, and jacking the rotating shaft of the motor rotor 2 by using the support frames 8 on the outer side of the motor end cover 9. As shown in fig. 6.

(6) Two support frames 8 between the motor stator 1 and the motor end cover 9 are removed, the motor end cover 9 is installed on two sides of the stator and the rotor, and in the process, the motor rotor 2 is supported by the two support frames 8 on the outer side of the motor end cover 9. As shown in fig. 7.

(7) After the motor end covers 9 on the two sides are installed, the remaining two support frames 8 are removed, and the motor rotor 2 is penetrated back and the installation work is finished. As shown in fig. 8.

In the whole process of the working procedures, the motor stator 1 and the motor rotor 2 are not in contact, so that the collision and the abrasion between the motor stator 1 and the motor rotor 2 are avoided, and the parts such as a stator iron core, a stator slot wedge, a rotor iron core and the like can not be damaged.

The process of using the rotor penetrating device to penetrate the motor rotor 2 back, which is provided by the application, does not adopt the operation mode of hoisting the plant crane 10-steel wire rope 11, so that the condition that the motor rotor 2 with large mass shakes in the air does not exist, as long as the motor stator 1 is adjusted in 3 directions in advance, and the central line of the motor rotor 2 is on a horizontal straight line, the motor rotor 2 can be easily penetrated into the motor stator 1, the collision and abrasion between the motor stator 1 and the motor rotor 2 are avoided, and the structural damage of the motor stator 1 and the motor rotor 2 is effectively prevented.

Use the rotor device that wears that this application provided to carry out motor rotor 2's back-through, can to a great extent reduce required staff's quantity, require not high to the degree of adaptability between the staff moreover, the rotor is worn to 6 kilovolts of general motors as long as 2 people can accomplish, has saved the human cost, can not bring the risk to staff's personal safety yet.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The device for penetrating the rotor through the motor is characterized by comprising a guide rail (3), a dummy shaft sleeve (4), a stator moving device (5) and a rotor supporting device, wherein the stator moving device (5) moves back and forth along the guide rail (3), and the rotor supporting device is used for supporting a motor rotor (2);

the stator moving device (5) comprises an object placing plate and a moving assembly, the moving assembly moves back and forth along the guide rail (5), a horizontal adjusting mechanism (6) is arranged between the moving assembly and the object placing plate and used for adjusting the levelness of the object placing plate, the motor stator (1) is placed on the object placing plate, and a limiting and positioning mechanism (7) is arranged on the object placing plate and used for limiting and positioning the motor stator (1);

the rotor supporting device comprises a plurality of supporting frames (8), and the arrangement position and the height of the supporting frames (8) can be adjusted.

2. A machine threading rotor device according to claim 1, characterized in that said guide (3) comprises two horizontal rails parallel to each other.

3. A motor rotor piercing device according to claim 1, characterized in that the support frame (8) is arranged between two horizontal rails.

4. The motor rotor penetrating device is characterized in that the stator moving device (5) is a horizontal pallet truck, the object placing plate is a bedplate, the moving assembly is a wheel, a horizontal adjusting mechanism (6) is arranged between the wheel and the bedplate and used for adjusting the levelness of the bedplate, and a limiting and positioning mechanism (7) is arranged on the bedplate and used for fixing the motor stator (1) on the bedplate.

5. The device as claimed in claim 4, wherein the number of the wheels is 4.

6. A motor rotor piercing device as claimed in claim 4, characterized in that the level adjustment means (6) is a level fine adjustment knob provided between each wheel and the table.

7. The device for penetrating the rotor of the motor according to claim 1, wherein the position limiting and positioning mechanism (7) comprises 4 positioning knobs which are respectively arranged at four corners of the object placing plate.

8. A motor rotor piercing device according to claim 1, characterized in that the support frame (8) is a hydraulic lifting support frame.

9. A motor rotor piercing device as claimed in claim 8, characterized in that the support frame (8) is provided with graduation marks.

10. A motor rotor threading device according to claim 1, characterized in that the top of the support frame (8) is concave arc-shaped, matching the shape of the rotating shaft of the motor rotor (2) and matching the shape of the dummy shaft sleeve (4) sleeved on the rotating shaft of the electronic rotor (2).